2014-12-08 01:09 Haswell has quit [Quit: Saliendo] 2014-12-08 01:36 whitequark, where did you get your vacuum gear from? 2014-12-08 02:26 FDCX has quit [Ping timeout: 260 seconds] 2014-12-08 02:38 FDCX has joined #qi-hardware 2014-12-08 02:47 atommann has joined #qi-hardware 2014-12-08 02:52 Luke-Jr has quit [Read error: Connection reset by peer] 2014-12-08 02:53 Luke-Jr has joined #qi-hardware 2014-12-08 03:13 FDCX has quit [Ping timeout: 260 seconds] 2014-12-08 03:25 FDCX has joined #qi-hardware 2014-12-08 03:42 rejon has joined #qi-hardware 2014-12-08 05:57 lvtcshop on ebay 2014-12-08 05:58 $110 for gear and $85 for delivery approx 2014-12-08 05:58 sb0: ^ 2014-12-08 06:02 the pump?! 2014-12-08 06:03 just the clamps and pipes, right? 2014-12-08 06:14 yeah 2014-12-08 06:14 the pump was about $250 in RU 2014-12-08 06:14 and almost free delivery 2014-12-08 06:14 turbo pump that is. rough is another $100 2014-12-08 06:15 where did you find those? 2014-12-08 06:15 atgreen has quit [Ping timeout: 258 seconds] 2014-12-08 06:15 chipmaker.ru, avito.ru. local craigslist-like things 2014-12-08 06:16 which one exactly? 2014-12-08 06:16 turbo pump from chipmaker, rough from avito 2014-12-08 06:16 rough you can find on ebay just as well, there are plenty of these noname pumps there 2014-12-08 06:17 it's an air conditioning pump basically 2014-12-08 06:17 yeah but all I find on ebay for roughing pumps is $400 min. 2014-12-08 06:17 oh 2014-12-08 06:17 lemme show you 2014-12-08 06:17 or it's bids, which I never win and piss me off 2014-12-08 06:17 haha, I won another bid for a turbo pump (from working equipment) for $250 too 2014-12-08 06:18 would have never thought that I do. also ext250hi 2014-12-08 06:18 so now I have two 2014-12-08 06:18 and then shipping is another $600 ... 2014-12-08 06:19 not really, ground was $12 and I used a remailer with a freight kinda option 2014-12-08 06:19 so it offset me about $80 2014-12-08 06:19 valhalla_ has joined #qi-hardware 2014-12-08 06:19 so it was a russian vendor? 2014-12-08 06:19 no, continental US 2014-12-08 06:20 the remailer airmails it to germany and then to russia, which takes about a month and somehow inexplicably much cheaper 2014-12-08 06:20 http://www.ebay.com/itm/Pfeiffer-Balzers-TPH330-Turbo-Molecular-Vacuum-Pump-/281395178055 is the typical offer I find 2014-12-08 06:20 $1,850 + $305 shipping to HK 2014-12-08 06:20 fuckit 2014-12-08 06:21 yeah, you need to look harder. set an alert and let it sit there for a few months 2014-12-08 06:21 well, the typical "good" one. most are like $6000 2014-12-08 06:21 so http://www.ebay.com/itm/BOC-Edwards-EXT-250-Turbomolecular-Pump-/161507454254?pt=BI_Pumps&hash=item259a982d2e 2014-12-08 06:21 used, for $500 2014-12-08 06:21 no controller? 2014-12-08 06:21 valhalla has quit [Ping timeout: 264 seconds] 2014-12-08 06:22 controller you can get for $75 or so, if you're lucky 2014-12-08 06:22 (mine from chipmaker was with controller as well) 2014-12-08 06:22 I'm *never* lucky on goddamed ebay, and I fucking hate it 2014-12-08 06:22 http://www.ebay.com/itm/Edwards-EXDC160-D39641000-/161504708334?pt=BI_Pumps&hash=item259a6e46ee 2014-12-08 06:22 get it while it's hot 2014-12-08 06:22 exdc160, even. more powerful than mine 2014-12-08 06:22 although you don't really need those 160 watts 2014-12-08 06:23 "Ships to: United States". so I need to ship it to a friend, who forwards it, etc. 2014-12-08 06:23 yes 2014-12-08 06:23 or remailer 2014-12-08 06:23 if you want to win cheap auctions, that's the only way 2014-12-08 06:24 my other wins include: active pirani gauge for $75, active inverted magnetron for $48 2014-12-08 06:24 also, "untested". isn't that synonymous for "broken" on ebay? 2014-12-08 06:24 have you seen what's inside that controller? I have, I disassembled it 2014-12-08 06:24 it's dumb as hell. it has six FETs and a bog-standard TI BLDC controller 2014-12-08 06:24 valhalla_ has quit [Ping timeout: 240 seconds] 2014-12-08 06:24 there's no way you're going to kill it, unless you're completely incompetent 2014-12-08 06:25 valhalla has joined #qi-hardware 2014-12-08 06:25 still a pain to fix, especially if those FETs are obsolete or unsourceable for some other reason 2014-12-08 06:25 typical IR FETs 2014-12-08 06:25 and it's not really going to be broken, it's just, you see 2014-12-08 06:25 if they say "working", they have to process warranty and/or returns 2014-12-08 06:26 additionally not many people have the ability to test the gear 2014-12-08 06:26 so maybe for other stuff, yes, but for vacuum untested usually means "I don't have the ability to test this and/or not want to bother" 2014-12-08 06:26 since it lowers price 3-4x, I'm totally fine with it, because you can just buy another if it's broken :p 2014-12-08 06:27 "tested" inverted magnetron gauges for $400 2014-12-08 06:27 I could buy almost eight "untested" ones for that, obviously it makes economic sense 2014-12-08 06:28 what remailer did you use? 2014-12-08 06:29 shopfans.ru 2014-12-08 06:29 I think they would even send to non-RU, altough their process is tailored to RU. express delivery to the door, customs handling, etc 2014-12-08 06:30 fairly cheap too 2014-12-08 06:34 I also wonder if those second-hand turbopumps could be contaminated with oil from the previous roughing pump 2014-12-08 06:35 well, significant contamination will probably be visible 2014-12-08 06:36 idundidit has joined #qi-hardware 2014-12-08 06:36 worst case, you'll have to reassemble and clean it, which, contrary to what the pump vendor wants you to think, is completely doable 2014-12-08 06:36 afaik people usually boil the internals in ether to remove oil 2014-12-08 06:37 sb0: http://www.ebay.com/itm/2Stage-5CFM-Rotary-Vane-Vacuum-Pump-For-R410-R134-Refrigerant-Air-Condition-HVAC-/201236473761?pt=BI_Pumps&hash=item2edaa0e7a1 2014-12-08 06:38 this is the rough pump I was referring to 2014-12-08 06:38 although if your turbo pump has a drag stage, like edwards usually does, you don't need 2stage rotary vane 2014-12-08 06:38 mine is 1-stage and that totally suffices. in fact anything under 500 Pa will do 2014-12-08 06:39 sb0: http://www.ebay.com/itm/3CFM-Rotary-Vane-Deep-Vacuum-Pump-1-4HP-HVAC-AC-Air-Tool-Freon-R410a-R134-etc-/400818965677?pt=LH_DefaultDomain_0&hash=item5d52ac0cad 2014-12-08 06:39 ah, I see, you got one for refrigeration stuff 2014-12-08 06:39 $21 :p 2014-12-08 06:39 yes 2014-12-08 06:39 you probably get a lot of oil backstreaming with that, though 2014-12-08 06:40 do you mean like oil vapor? 2014-12-08 06:40 do you use the original oil, or did you replace it with something better? 2014-12-08 06:40 yeah 2014-12-08 06:41 possibly. I will see it better when I get my gauges 2014-12-08 06:41 and I read that this oil vapor tends to stick to surfaces and create a mess in UHV 2014-12-08 06:41 you generally have to bake the UHV equipment to remove water, this also helps with oil 2014-12-08 06:41 not to mention turbo pumps can actually pump oil vapor quite efficiently 2014-12-08 06:42 I used original oil, however before putting it in, I disassembled the pump and cleaned it 2014-12-08 06:42 yeah... but I heard other opinions (from physicists) about what happens to oil when baking 2014-12-08 06:42 there were some oil-like residues inside which was green, smelly and muddy 2014-12-08 06:42 as a bonus point I now know how a rotary vane pump looks inside :p 2014-12-08 06:43 so much of this stuff is in the US... 2014-12-08 06:44 I'm sure you can find a rotary vane pump locally 2014-12-08 06:45 hmm, I'd rather try to find a scroll pump 2014-12-08 06:45 they're bloody expensive 2014-12-08 06:45 do you really need one? 2014-12-08 06:45 oil is messy 2014-12-08 06:45 money is scarce 2014-12-08 06:45 especially in UHV 2014-12-08 06:46 http://www.ebay.com/itm/Busch-Fossa-18-F018-Scroll-Vacuum-Pump-/281395168490 not worse than the typical turbomolecular pump offer 2014-12-08 06:47 try meeting your local scientists, sometimes the lab has an upgrade and they throw out old equipment en masse 2014-12-08 06:47 yeah, that's how I got my previous stuff already :) 2014-12-08 06:47 I wouldn't pay $2k for a turbo pump :p 2014-12-08 06:49 ooooo, my pirani gauge just arrived at the post office. 2014-12-08 06:49 or maybe that was something else 2014-12-08 06:49 crap, it was. 2014-12-08 06:50 http://www.ebay.com/itm/Scroll-Meister-anest-iwata-Oil-free-scroll-vacume-pump-ISP-500B-/151503915943 2014-12-08 06:50 He said the repair on this unit cost $500-700. But he said its simple for someone who knows about these. Selling as-is thanks! 2014-12-08 06:50 GOD BLESS! 2014-12-08 06:50 not very inspiring 2014-12-08 07:55 jekhor has joined #qi-hardware 2014-12-08 08:06 whitequark: what the heck are you doing? Vacuum, iverted magnetrons (whatever that is) :-o .oO(???) 2014-12-08 08:07 inverted magnetron gauge, it's a vacuum gauge for under 10^-1 torr of pressure 2014-12-08 08:07 it's not the same magnetron as in a microwave oven in that it's not self-oscillating (afaik) 2014-12-08 08:08 the "magnetron" part comes from two strong magnets which confine any plasma that exists near them to a small ring region 2014-12-08 08:08 the gauge works by lighting up the plasma and measuring the current that flows through it. the less current, the less pressure 2014-12-08 08:09 between 10^1 and 10^-1 it's a pirani gauge. that one's simpler. you have a resistor bridge, one of which is inside the chamber 2014-12-08 08:09 the less pressure there is, the less heat is convected/conducted by the gas 2014-12-08 08:09 (tip: if you want to convert torr into something more manageable, apt-get install units) 2014-12-08 08:10 is that better than Bayard Alpert gauges? 2014-12-08 08:10 fine fine, but WHAT for do you need that stuff? 2014-12-08 08:10 hot filament ionization? yes, definitely 2014-12-08 08:10 ionization gauges tend to be fragile as heck with the glass enclosure, and generally you can get shit deposited on the filament 2014-12-08 08:10 related to your 5 bazillion Volt shortwave function generator? 2014-12-08 08:11 by your process 2014-12-08 08:11 with inverse magnetron, you can disassemble it and clean the anode with rubbing alcohol 2014-12-08 08:11 (and it's generally less susceptible to drift from deposited crap) 2014-12-08 08:11 DocScrutinizer05: yes, the function generator would be for a quadrupole mass spectrometer 2014-12-08 08:12 ahaaaaa mass spectro 2014-12-08 08:12 but I want other things too, like plasma etching and thin film deposition 2014-12-08 08:12 now we're talking :-) 2014-12-08 08:12 mass spectro is very useful for that! 2014-12-08 08:12 how'd you control the process otherwise? 2014-12-08 08:13 nfc, never thought about it 2014-12-08 08:13 well, that's how it's done in the industry :p 2014-12-08 08:13 except for "make a copper wire explode and enjoy the funny color deposits on all the stuff in vicinity" 2014-12-08 08:14 thin film deposition I actually don't even need turbo pump for 2014-12-08 08:14 let me show you this video 2014-12-08 08:14 funny that you mention gas flow cooling a resistor 2014-12-08 08:15 I just said about the same, in a completely different context, for determining wind speed 2014-12-08 08:15 yep, it's also used in anemometers 2014-12-08 08:15 very cheap, fairly reliable, somewhat precise 2014-12-08 08:15 DocScrutinizer05: https://www.youtube.com/watch?v=c4Sic1DRXJI 2014-12-08 08:15 hehe, and included in Neo900 2014-12-08 08:16 since we got a hygrometer that has a 10,W internal heater and a 14bit thermometer built in 2014-12-08 08:16 10mW 2014-12-08 08:17 there's that eink tablet for outdoor enthusiasts 2014-12-08 08:17 packed to the brim with sensors 2014-12-08 08:17 DUH! 2014-12-08 08:17 earl 2014-12-08 08:17 link!!! 2014-12-08 08:17 http://www.meetearl.com/ 2014-12-08 08:17 ooh that one, think I heard about it already 2014-12-08 08:17 I actually think I heard of it from you 2014-12-08 08:17 isn't earl a dog? 2014-12-08 08:18 no clue 2014-12-08 08:18 so for thin film, I don't even need turbo pump, just a pair of strong magnets, some DC source and argon 2014-12-08 08:19 no one sells broken microwaves anymore, they're not valuable enough D: 2014-12-08 08:20 umm except for the VHF/UHF transceiver (GMRS, PMR446, UHFCB) and AM/FM/SW/LW/WB I think Neo900 is on par :-D 2014-12-08 08:20 but then we got a real modem 2014-12-08 08:20 ;-D 2014-12-08 08:20 cellular modem 2014-12-08 08:22 wtf is a "glove friendly capacitive touchscreen"? 2014-12-08 08:23 whitequark: thought you were suggesting the earl had anemometer 2014-12-08 08:23 I think it had 2014-12-08 08:23 glove friendly touchscreen, I think some old touchscreens did not work with gloves 2014-12-08 08:23 most modern ones do anyway 2014-12-08 08:25 hm, doesn't seem to have an anemometer 2014-12-08 08:25 I wonder how they do that 2014-12-08 08:25 maybe it was an earlier "stretch goal" or something? 2014-12-08 08:25 I remember it quite well 2014-12-08 08:25 or *if* 2014-12-08 08:26 now that you mention it, yes, I think I seen sth like that and thought "duh, you need to hold that board directly in wind direction or you will not meter the real windspeed through that hole" 2014-12-08 08:26 I think it was expandable or something 2014-12-08 08:26 pull-out 2014-12-08 08:27 still the sensor would be pretty directional 2014-12-08 08:28 iow there's one postition 90° off the right one, where the anemometer will read zarro even when hurricane hits you 2014-12-08 08:29 sure 2014-12-08 08:29 it helps to not be dumb 2014-12-08 08:29 but well, wind speed is in 12 steps or sth, and not very steady either, and user has a certain idea where from it blows ;-) 2014-12-08 08:30 iow you wouldn't need highly exact readouts anyway 2014-12-08 08:31 "rotate 180° slowly, device will calculate correct maximum and wind direction" 2014-12-08 08:31 :-) 2014-12-08 08:32 Neo900 will not be able to do that, data acquisition rate is way too low for that 2014-12-08 08:32 thanks to thermal "inertia" of the sensor 2014-12-08 08:44 wej has quit [Ping timeout: 272 seconds] 2014-12-08 08:48 I think new ones son't either 2014-12-08 08:48 oops 2014-12-08 08:48 wej has joined #qi-hardware 2014-12-08 08:48 that YT video has the best subtitle at the very end :-D 2014-12-08 08:49 alas for really decent laser you need convex mirrors 2014-12-08 08:49 ohhh 2014-12-08 08:50 well, this guy considers a MOT an acceptable power source 2014-12-08 08:50 i bet he'll make do with this mirror 2014-12-08 08:50 it kinda will work, sure 2014-12-08 08:50 wolfspraul has joined #qi-hardware 2014-12-08 08:50 but convergence and beam diameter will be *eeeew* 2014-12-08 08:51 well, I'm looking forward to the next part of this enterprise 2014-12-08 09:11 pcercuei has joined 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